Method and device connecting down drain pipes for producing a ventilating gyrolaminar flow

ABSTRACT

The branching pipe device mounted between an upper and a lower portion of a down drain pipe, the said device comprising a main inlet located for tangentially projecting fluid on the inside wall of the device to form a fluid curtain, secondary inlets for preventing the flow from the main inlet to flow upwardly, inclined planes for regenerating the movement of the fluid and cutting the fluid curtain to maintain the intercommunication between the atmospheric pressure of the air inside the device and the air from the secondary inlets.

United States Patent Inventors Monique Legg nee Jouve [50] Field of 138/42, 44, 137/815; 138/41,43, 45, 46

References Cited UNITED STATES PATENTS 8/1968 Oshima et al.

39, 40, (lnquired) 3, Avenue Anatole France;

Georges Richard, 51, Avenue St-Jerome, Aix-En-Provence, France 703,069

Appl. No. [22] Filed Feb. 5, 1968 I 45] Patented Mar. 2, 1971 32 Priority Feb.6,1967,Feb.6,1967,Feb.6,1967, FOREIGNPATENTS n 19 7 Feb 7 19 7 m 19 7 1,205,025 11/1965 Germany...................... 13, 1967 13! 1967 1 Primary Examiner- Louston S. Bell, 3 r.

Mar. 9, 1967, July 28, 1967, Aug. 9, A"0mey Raym0nd Robic METHOD AND DEVICE CONNECTING DOWN DRAIN PIPES FOR PRODUCING A VENTILLATING GYRO- LAMINAR FLOW BACKGROUND OF THE INVENTION In down drain pipes of buildings, the evacuated fluids flow in bulk and in a random way. This produces annoying phenomena such as noises and pressure variations which release siphons, and create emanations and projections.

SUMMARY OF THE INVENTION The present invention is a new method and a new device for obtaining a ventilated gyro-laminar flow, which consist in:

injecting the evacuated fluids either in gyration in the drain such as a vertical tubular member wherein the fluid flows as a laminar film in contact with the inner wall of the tubular member produced by a centrifugal force, either directly by a laminar flow, or either by a combination of gyration and laminar flow. maintaining the gyratory movement of the fluids or creating this movement from the laminar flow: v slowing down the downward movement of the fluids on all or part of the drain, maintaining the permanent intercommunication with the atmosphere, of the air at the center'of the down drain and of the air inside the branching pipes of the drain. The reduction of the annoying phenomena by means of the ventilated gyro-laminar is such that:

the diameter of the drain may be reduced; the number of the branching pipes reaching the same drain pipe increase; all the sanitary and flushing apparatuses may be, with the water closets connected to" the same drain pipe without secondary ventilation. A considerable saving and simplification result fromthis arrangement.

The invention consists essentially in connecting to the drain one or a plurality of pieces which create and maintain a ventilated gyro-laminar flow.

DESCRIPTION OF THE DRAWINGS In the drawings which illustrate embodiments of the invention,

FIG. I is a diagrammatic vertical cross section of a drain according to the invention;

FIG. 2 is a cross section of the drain at the level of a branching pipe along line II-II of FIG. 1;

FIG. 3 is a vertical cross section of the drain at the level IIIIII of FIG. 1 corresponding to the bottom of the drain;

FIG. 4 is a diagrammatic vertical section of another embodiment of the invention;

FIG. 5 is a vertical cross section along line A-A of FIG. 4;

FIG. 6 is a vertical cross section along line 8-8 of FIG. 4.

DESCRIPTION AND OPERATION The fluid coming from the connected channel 5 is injected in a drain or tubular member 1 along a tangent. The liquid flows along a linear line in the connected channel 5, in a straight line as shown by the arrow 6 and in a rotating manner as shown by the arrows 7 and 9, so that .a gyratory movement of the fluid is obtained. The centrifugal force makes the fluid adhere to the wall of the tubular member 1 so that a laminar film is obtained. The center of the tubular member 1 consists of an air column in contact with the atmosphere 3. The gyratory movement l0, 12 of the fluid is maintained by one or a plurality of oblique deflectors 11 which may be convex or concave. The downward movement 14 of the fluid is slowed down by the friction surface 15 of the enlargement body 13 of the wall. Before the fluid reaches the elbow located at the bottom of the tubular member, the film 16 is split by a wedge 18. The fluid flows on both sides of the wedge according to the arrows I9 and 20. Due to the window 17 which is then opened in the film, the air of the pipe 22 communicates with the air of the air column of the down drain.

FIGS. 4, 5 and 6 illustrate a different and preferred embodiment consisting of a bowl-shaped member adapted to be connected to branching pipes.

The drain 30 is crossed from an upper level 31 to a lower level 32 by the fluid which is collected above the branching pipe device 34. The fluid flows in a laminar manner according to the arrows 33. The fluid penetrates in the body 34 of the device in which it spreads due to the centrifugal force so as to be in contact with the surface 35 where it is slowed down by the friction and the lengthening of the path. The fluid resumes its descending movement against the wall of the tubular member according to the gyro-laminar movement 36.

The aperture 37 adapted to receive a large flow injects the I fluid coming from a secondary channel along a tangent to the drain in such a way that the oblique axis of the injection fails to meet the vertical axis of the drain but surrounds it instead. The injected fluid flows in a gyratory descending movement ventilated along the arrows 40 and 36.

One or a plurality of convex or concave inclined planes 47 located in the main inlet 31 of the branching pipe device, guide and cut the fluid curtain so as to place in communication the air at the center of the drain which is at an atmospheric pressure with the air of the secondary inlets 42 which leads to the body 34 of the branching piece device. These inclined planes 47 which regenerate the gyro-laminar movement and cut to pieces the consistent products transported by the fluid without stopping them. This latter result is obtained by the sharp profile 48 of the inclined'planes which are sufficiently receding.

Each of the secondary inlets brings 42 in the body 34 one or a plurality of flows having a small discharge. These secondary inlets enable the fluid 43' to flow without any planned direction. Howeventhey are located at a distance which is sufficiently high above the injection axis 38 of the fluid having a large discharge. This arrangement prevents the fluid injected through the inlet 37 to flow upwardly through the secondary inlets 42.

As an added security, deflectors 44 may be used to cut the upper fluid jets 45 and to project them beyond the inlets 42. This way, the movement of the fluid jets does not disturb the pressure in the siphons the sanitary apparatuses connected to the inlets 42.

A partition 46 located on one side of the fluid injection axis 38 having a large discharge tends to deviate this axis in the direction of the gyration. This deviation effect adds to the function of the deflector 44 regarding the fluid jets rotating in the body 34 so as to prevent the said jets to raise in the aperture 37.

The skirt 41' helps to-prevent the obstruction of the central part of the branching pipe device by the injected fluid in the aperture 37 and facilitates the laminar injection. The skirt alone may create by itself the laminar injection in the case where there is no gyratory injection.

All the elements which are essentially functional according to FIGS. 1, 2 and 3 are assembled in the branching pipe device such as described and illustrated in FIGS. 4, 5 and 6.

According to certain embodiments, certain elements may be eliminated or their combination may be modified, the general conception of the invention being the same, that is the ventilated gyro-laminar flow of the fluid discharged by the down drain.

We claim:

1. A branching pipe device connected between an upper and lower portion of a down drain in a building to obtain a ventilated gyro-laminar flow, the said device comprising:

at least one main inlet on said device for receiving a large discharge of fluids in the drain in a ventilated gyrolaminar movement so as to form a fluid curtain inside said device;

at least one secondary inlet on said device for receiving in a random direction a small fluid discharge inside said device; a slowing-down surface for the fluid;

at least one inclined plane regenerating the gyratory movement, and cutting the fluid curtain and evacuated consistent products without stopping the latter;

deflectors fixed in the device for preventing splashing of the fluid in gyration in the direction of the secondary inlets; and

a skirt mounted about the center of the drain for eliminating the obstruction and facilitating the laminar injection.

2. A branching pipe device connected between an upper and lower portion of a down drain for the hydraulic fall in a building to obtain a ventilated gyro-laminar flow the said device comprising:

a tub element having an upper section substantially oval and having an outlet at the lower end;

at least one main inlet at the upper end of the tub, for receiving a large discharge of fluid along the inner surface of the tube to'form a gyro-laminar movement and a fluid curtain inside said device;

at least one secondary inlet on said device for receiving in a random direction a small fluid discharge inside said device;

a braking surface constituted by the lower sides of the said tub,

a tubular skirt projecting inside the tube at the upper central part in order to eliminate the obstruction and to facilitate the laminar injection;

at least one inclined surface around said skirt for regenerating the gyratory movement, the said inclined surfaces cutting the fluid curtain and braking the evacuated consistent products without stopping them; and

deflectors mounted around the tubular skirt for preventing splashing the fluid in gyration in the direction of the secondary inlets.

3. A device according to claim 2, in which a partition is located inside said device between the tubular skirt and the main inlet for guiding the moving fluid in the direction of the gyration.

4. A method for evacuating fluid in a down drain by producing a ventilated gyro-laminar flow of the fluid in a down drain which consists of:

injecting the fluid in a gyratory movement in the down drain through a tangential inlet on the drain so that the fluid will flow by centrifugal force to form a laminar film on the inside wall of the drain and create an air column at the center thereof;

maintaining a gyratory movement of the fluid in the down drain;

slowing down the downward movement of the fluid on all or part of the drain; and

maintaining the. permanent intercommunication between the atmospheric pressure and the air column inside the drain. 

1. A branching pipe device connected between an upper and lower portion of a down drain in a building to obtain a ventilated gyro-laminar flow, the said device comprising: at least one main inlet on said device for receiving a large discharge of fluids in the drain in a ventilated gyro-laminar movement so as to form a fluid curtain inside said device; at least one secondary inlet on said device for receiving in a random direction a small fluid discharge inside said device; a slowing-down surface for the fluid; at least one inclined plane regenerating the gyratory movement, and cutting the fluid curtain and evacuated consistent products without stopping the latter; deflectors fixed in the device for preventing splashing of the fluid in gyration in the direction of the secondary inlets; and a skirt mounted about the center of the drain for eliminating the obstruction and facilitating the laminar injection.
 2. A branching pipe device connected between an upper and lower portion of a down drain for the hydraulic fall in a building to obtain a ventilated gyro-laminar flow the said device comprising: a tub element having an upper section substantially oval and having an outlet at the lower end; at least one main inlet at the upper end of the tub, for receiving a large discharge of fluid along the inner surface of the tube to form a gyro-laminar movement and a fluid curtain inside said device; at least one secondary inlet on said device for receiving in a random direction a small fluid discharge inside said device; a braking surface constituted by the lower sides of the said tub; a tubular skirt projecting inside the tube at the upper central part in order to eliminate the obstruction and to facilitate the laminar injection; at least one inclined surface around said skirt for regenerating the gyratory movement, the said inclined surfaces cutting the fluid curtain and braking the evacuated consistent products without stopping them; and deflectors mounted around the tubular skirt for preventing splashing the fluid in gyration in the direction of the secondary inlets.
 3. A device according to claim 2, in which a partition is located inside said device between the tubular skirt and the main inlet for guiding the moving fluid in the direction of the gyration.
 4. A method for evacuating fluid in a down drain by producing a ventilated gyro-laminar flow of the fluid in a down drain which consists of: injecting the fluid in a gyratory movement in the down drain through a tangential inlet on the drain so that the fluid will flow by centrifugal force to form a laminar film on the inside wall of the drain and create an air column at the center thereof; maintaining a gyratory movement of the fluid in the down drain; slowing down the downward movement of the fluid on all or part of the drain; and maintaining the permanent intercommunication between the atmospheric pressure and the air column inside the drain. 